netdev - [PATCH v2 2/8] bpf powerpc: Remove extra_pass from bpf_jit_build

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Message-Id: <20210917153047.177141-3-hbathini@linux.ibm.com>
Date:   Fri, 17 Sep 2021 21:00:41 +0530
From:   Hari Bathini <hbathini@...ux.ibm.com>
To:     naveen.n.rao@...ux.ibm.com, mpe@...erman.id.au, ast@...nel.org,
        daniel@...earbox.net
Cc:     christophe.leroy@...roup.eu, paulus@...ba.org, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Subject: [PATCH v2 2/8] bpf powerpc: Remove extra_pass from bpf_jit_build_body()

From: Ravi Bangoria <ravi.bangoria@...ux.ibm.com>

In case of extra_pass, usual JIT passes are always skipped. So,
extra_pass is always false while calling bpf_jit_build_body() and
thus it can be removed.

Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
---

Changes in v2:
* Updated the changelog wording a bit.


 arch/powerpc/net/bpf_jit.h        | 2 +-
 arch/powerpc/net/bpf_jit_comp.c   | 6 +++---
 arch/powerpc/net/bpf_jit_comp32.c | 4 ++--
 arch/powerpc/net/bpf_jit_comp64.c | 4 ++--
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h
index d6267e93027a..411c63d945c7 100644
--- a/arch/powerpc/net/bpf_jit.h
+++ b/arch/powerpc/net/bpf_jit.h
@@ -166,7 +166,7 @@ static inline void bpf_clear_seen_register(struct codegen_context *ctx, int i)
 
 void bpf_jit_emit_func_call_rel(u32 *image, struct codegen_context *ctx, u64 func);
 int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context *ctx,
-		       u32 *addrs, bool extra_pass);
+		       u32 *addrs);
 void bpf_jit_build_prologue(u32 *image, struct codegen_context *ctx);
 void bpf_jit_build_epilogue(u32 *image, struct codegen_context *ctx);
 void bpf_jit_realloc_regs(struct codegen_context *ctx);
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c
index 53aefee3fe70..c5c9e8ad1de7 100644
--- a/arch/powerpc/net/bpf_jit_comp.c
+++ b/arch/powerpc/net/bpf_jit_comp.c
@@ -149,7 +149,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
 	cgctx.stack_size = round_up(fp->aux->stack_depth, 16);
 
 	/* Scouting faux-generate pass 0 */
-	if (bpf_jit_build_body(fp, 0, &cgctx, addrs, false)) {
+	if (bpf_jit_build_body(fp, 0, &cgctx, addrs)) {
 		/* We hit something illegal or unsupported. */
 		fp = org_fp;
 		goto out_addrs;
@@ -162,7 +162,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
 	 */
 	if (cgctx.seen & SEEN_TAILCALL) {
 		cgctx.idx = 0;
-		if (bpf_jit_build_body(fp, 0, &cgctx, addrs, false)) {
+		if (bpf_jit_build_body(fp, 0, &cgctx, addrs)) {
 			fp = org_fp;
 			goto out_addrs;
 		}
@@ -210,7 +210,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *fp)
 		/* Now build the prologue, body code & epilogue for real. */
 		cgctx.idx = 0;
 		bpf_jit_build_prologue(code_base, &cgctx);
-		bpf_jit_build_body(fp, code_base, &cgctx, addrs, extra_pass);
+		bpf_jit_build_body(fp, code_base, &cgctx, addrs);
 		bpf_jit_build_epilogue(code_base, &cgctx);
 
 		if (bpf_jit_enable > 1)
diff --git a/arch/powerpc/net/bpf_jit_comp32.c b/arch/powerpc/net/bpf_jit_comp32.c
index beb12cbc8c29..b60b59426a24 100644
--- a/arch/powerpc/net/bpf_jit_comp32.c
+++ b/arch/powerpc/net/bpf_jit_comp32.c
@@ -266,7 +266,7 @@ static void bpf_jit_emit_tail_call(u32 *image, struct codegen_context *ctx, u32
 
 /* Assemble the body code between the prologue & epilogue */
 int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context *ctx,
-		       u32 *addrs, bool extra_pass)
+		       u32 *addrs)
 {
 	const struct bpf_insn *insn = fp->insnsi;
 	int flen = fp->len;
@@ -860,7 +860,7 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context *
 		case BPF_JMP | BPF_CALL:
 			ctx->seen |= SEEN_FUNC;
 
-			ret = bpf_jit_get_func_addr(fp, &insn[i], extra_pass,
+			ret = bpf_jit_get_func_addr(fp, &insn[i], false,
 						    &func_addr, &func_addr_fixed);
 			if (ret < 0)
 				return ret;
diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
index b87a63dba9c8..2a87da50d9a4 100644
--- a/arch/powerpc/net/bpf_jit_comp64.c
+++ b/arch/powerpc/net/bpf_jit_comp64.c
@@ -272,7 +272,7 @@ static void bpf_jit_emit_tail_call(u32 *image, struct codegen_context *ctx, u32
 
 /* Assemble the body code between the prologue & epilogue */
 int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context *ctx,
-		       u32 *addrs, bool extra_pass)
+		       u32 *addrs)
 {
 	const struct bpf_insn *insn = fp->insnsi;
 	int flen = fp->len;
@@ -769,7 +769,7 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context *
 		case BPF_JMP | BPF_CALL:
 			ctx->seen |= SEEN_FUNC;
 
-			ret = bpf_jit_get_func_addr(fp, &insn[i], extra_pass,
+			ret = bpf_jit_get_func_addr(fp, &insn[i], false,
 						    &func_addr, &func_addr_fixed);
 			if (ret < 0)
 				return ret;
-- 
2.31.1